Download or read book Meiosis in Two Species and Three Hybrids of Crepis and Its Bearing on Taxonomic Relationship Classic Reprint written by Ernest Brown Babcock and published by Forgotten Books. This book was released on 2017-10-27 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Meiosis in Two Species and Three Hybrids of Crepis and Its Bearing on Taxonomic Relationship The buds are put in the Carnoy fixative and, as for Crepis, the tips of the involucral scales are removed in order to facilitate pene tration of the fixative between the florets. The buds remain in the first fixative from three to ten minutes, when they are changed into Navashin's formalin-chromic-acetic acid. Carnoy's fluid seems to prepare the way through the tissue for the second fixative, but in the Short time of application it does not dehydrate or collapse the tissue. Kihara (1924) describes a combination carnoy-flemming's fluid which is based on the same principle as the combination here described. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Meiosis in Two Species and Three Hybrids of Crepis and Its Bearing on Taxonomic Relationship written by Ernest Brown Babcock and published by . This book was released on 1929 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meiosis in Two Species and Three Hybrids of Crepis and Its Bearing on Taxonomic Relationship P2 15 written by E B (Ernest Brown) 1877-1 Babcock and published by Hassell Street Press. This book was released on 2021-09-10 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Meiosis in Two Species and Three Hybrids of Crepis and Its Bearing on Taxonomic Relationship written by Ernest B. Babcock and published by . This book was released on 1919 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meiosis in Certain Interspecific Hybrids in Crepis and Its Bearing on Taxonomic Relationship Classic Reprint written by Ernest Brown Babcock and published by Forgotten Books. This book was released on 2017-11-07 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Meiosis in Certain Interspecific Hybrids in Crepis and Its Bearing on Taxonomic Relationship Most crepis species are excellent subjects for cytological research be cause of their generally large and morphologically distinct chromo somes. The genus includes three subgenera, in each of which numerous representative species have been studied with reference to comparative morphology, geographic distribution, and chromosome relations (bab cock and Cameron, 1934; Babcock, Cytogenetic studies on several hybrids between species in the same subgenus and in difierent subgenera have exhibited phenomena that throw light on problems of taxonomy, phylogeny, and evolution (babcock and N avashin, The present investigation was undertaken with the hope of contributing further evi dence on some of these problems. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Meiosis in Two Species and Three Hybrids of Crepis and Its Bearing on Taxonomic Relationship by E B Babcock and J Clauser written by E. B. Babcock and published by . This book was released on 1929 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meiosis in Certain Interspecific Hybrids in Crepis and Its Bearing on Taxonomic Relationship P6 12 written by E B (Ernest Brown) 1877-1 Babcock and published by Hassell Street Press. This book was released on 2021-09-10 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Meiosis in Certain Interspecific Hybrids in Crepis and Its Bearing on Taxonomic Relationship written by Ernest Brown Babcock and published by . This book was released on 1936 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Interspecific Hybrid Crepis Rubra X C Foetida and Some of Its Derivatives written by Charles Frederick Poole and published by Forgotten Books. This book was released on 2018-09-07 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Interspecific Hybrid, Crepis Rubra X C. Foetida, and Some of Its Derivatives: II. Two Selfed Generations From an Amphidiploid Hybrid Hollingshead, E. L. 1930. Hybrids of Crepis capillaris x C. Tectorum. Univ. Calif. Pub]. Agr. Sci, - 95. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book The Cytogenetic Relationships of Four Species of Crepis Classic Reprint written by James Angus Jenkins and published by Forgotten Books. This book was released on 2017-12-11 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Cytogenetic Relationships of Four Species of Crepis Collections of and (5) were made by Babcock in 1930, and the other two were sent to him at Berkeley in 1931. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Species Hybrids in Crepis and Their Bearing on Evolution written by and published by . This book was released on 1924 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Meiotic System written by Bernard John and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction When the study of heredity and variation first came to be treated as a scientific subject-and this, one must remember, was only just over a hundred years ago-there was an unfortunate separation between the disciplines of cytology and experimental breeding. This separation was based partly on a lack of understanding and partly on a lack of the desire to understand. Even WILLIAM BATESON, the first apostle of mendelism in England, had a blind spot for cytology and for many years dogmatically refused to believe that MENDEL'S determinants were transmitted and distributed by the chromosomes. This separation between cytology and experimental breeding is one which persists, in a measure, even today, simply because there are two quite different, though complementary, techniques available for the study of heredity and variation. On the one hand, one can study directly the structure and behaviour of the actual vehicles which transmit the genetic determinants from one generation to the next. This is the method employed by those who study genetics through a microscope. The alternative method is that used by the experimental breeder who, in default of being able to watch the hereditary factors segregate from each other directly, is obliged to examine the constitution of the germ cells indirectly by sampling, and usually at random, the products of a controlled mating.
Download or read book Distant Hybridization of Crop Plants written by G. Kalloo and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wild taxa are invaluable sources of resistance to diseases, insects/ pests, nematodes, temperature extremes, salinity and alkalinity stresses, and also of nutritional quality; adaptation; genetic diversity and new species. Utilization of wild relatives of a crop depends largely upon its crossability relations with cultivated varieties. Sev eral wild species are not crossable with the commercial cultivars due to various isolation barriers. Furthermore, in a few cases, hybridiza tion is possible only in one direction and reciprocal crosses are not successful, thus depriving the utilization of desired cytoplasm of many species. However, techniques have been developed to over come many barriers and hybrid plants are produced. New crop species have been developed by overcoming the F 1 sterility and producing amphidiploids and such crops are commercially being grown in the field. The segregation pattern ofF 1 hybrids produced by distant hybridization in segregating generations are different from the intervarietal hybrids. In former cases, generally, unidirectional segregation takes place in early generations and accordingly, selec tion procedures are adopted. In most of the cases, backcross or modified backcross methods have been followed to utilize wild species, and thus numerous types of resistance and other economical attributes have been transferred in the recurrent parents. Protoplast fusion has been amply demonstrated in a number of cases where sexual hybridization was not possible and, as a result, hybrids have been produced.
Download or read book Systematics Evolution and Biogeography of Compositae written by Vicki Ann Funk and published by . This book was released on 2009 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This spectacular book does full justice to the Compositae (Asteraceae), the largest and most successful flowering plant family with some 1700 genera and 24,000 species. It is an indispensable reference, providing the most up-to-date hypotheses of phylogenetic relationships in the family based on molecular and morphological characters, along with the corresponding subfamilial and tribal classification. The 2009 work not only integrates the extensive molecular phylogenetic analyses conducted in the last 25 years, but also uses these to produce a metatree for about 900 taxa of Compositae. The book contains 44 chapters, contributed by 80 authors, covering the history, economic importance, character variation, and systematic and phylogenetic diversity of the family. The emphasis of this work is phylogenetic; its chapters provide a detailed, current, and thoroughly documented presentation of the major (and not so major) clades in the family, citing some 2632 references. Like the Compositae, the book is massive, diverse, and fascinating. It is beautifully illustrated, with 170 figures, and an additional 108 cladograms (all consistently color-coded, based on the geographic range of the included taxa); within these figures are displayed 443 color photographs, clearly demonstrating the amazing array of floral and vegetative form expressed by members of the clade." --NHBS Environment Bookstore.
Download or read book Plant Systematics written by Gurcharan Singh and published by CRC Press. This book was released on 2019-06-07 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fourth edition of Plant Systematics is completely revised and updated. It incorporates the updated International Code of Nomenclature for Algae, Fungi and Plants (Shenzhen Code, 2018), the new version of PhyloCode (Beta version of Phylocode 5, 2014), APweb version 14 (September, 2018), revised Angiosperm Phylogeny Group classification (APG IV, 2016), new Pteridophyte Phylogeny Group Classification (PPG I, 2016), besides the updates since the publication of third edition. The book is a blend of classical fundamental aspects and recent developments, especially in the field of molecular systematics, cladistics and computer identification. Special attention has been given to information on botanical nomenclature, identification, molecular systematics and phylogeny of angiosperms. The complicated concepts of phylogeny, taxometrics and cladistics have been explained with a view to providing a comparison between these diverse but interactive fields of study. An attempt has been made to build upon a common example when exploring different methods, especially in procedures of identification, taxometrics and cladistics. The major systems of classification are evaluated critically. Discussion on major families of Pteridophytes, Gymnosperms and Angiosperms, especially those of major phylogenetic interest, form a major portion of this edition. The ebook includes nearly 500 color photographs set out in 36 pages covering plants from different parts of the world. In addition, 305 black & white illustrations have been included to provide a better understanding of the plants covered in the book.
Download or read book Plant Evolution and the Origin of Crop Species written by James F. Hancock and published by CABI. This book was released on 2012 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: The genetic variability that developed in plants during their evolution is the basic of their domestication and breeding into the crops grown today for food, fuel and other industrial uses. This third edition of Plant Evolution and the Origin of Crop Species brings the subject up-to-date, with more emphasis on crop origins. Beginning with a description of the processes of evolution in native and cultivated plants, the book reviews the origins of crop domestication and their subsequent development over time. All major crop species are discussed, including cereals, protein plants, starch crops, fruits and vegetables, from their origins to conservation of their genetic resources for future development.
Download or read book Problems of Cytology and Evolution in the Pteridophyta written by I. Manton and published by . This book was released on 1982 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
